#include <iostream>
#include <new>

using namespace std;

const int BUF = 512;
const int N = 5;
char buffer[BUF];

int main()
{
    double *pd1, *pd2;
    int i;
    cout << "Calling new and placement new:\n";
    pd1 = new double[N];
    pd2 = new (buffer) double[N];
    for (i = 0; i < N; i++)
    {
        pd2[i] = pd1[i] = 1000 + 20.0 * i;
    }
    cout << "Memory addresses: \n" << "heap: " << pd1 << ", static: " << (void *) buffer << ", " << pd2 << endl;
    cout << "Memory contents:\n";
    for (i = 0; i < N; i++)
    {
        cout << pd1[i] << " at " << &(pd1[i]) << "; ";
        cout << pd2[i] << " at " << &(pd2[i]) << endl;
    }

    cout << "\nCalling new and placement new a second time:\n";
    double *pd3, *pd4;
    pd3 = new double[N];
    pd4 = new (buffer) double[N];
    for (i = 0; i < N; i++)
    {
        pd4[i] = pd3[i] = 1000 + 40.0 * i;
    }
    cout << "Memory addresses: \n" << "heap: " << pd3 << ", static: " << pd4 << endl;
    cout << "Memory contents:\n";
    for (i = 0; i < N; i++)
    {
        cout << pd3[i] << " at " << &(pd3[i]) << "; ";
        cout << pd4[i] << " at " << &(pd4[i]) << endl;
    }

    cout << "\nCalling new and placement new a third time:\n";
    delete [] pd1;
    pd1 = new double[N];
    pd2 = new (buffer + N * sizeof(double)) double[N];
    for (i = 0; i < N; i++)
    {
        pd2[i] = pd1[i] = 1000 + 60.0 * i;
    }
    cout << "Memory addresses: \n" << "heap: " << pd1 << ", static: " << pd2 << endl;
    cout << "Memory contents:\n";
    for (i = 0; i < N; i++)
    {
        cout << pd1[i] << " at " << &(pd1[i]) << "; ";
        cout << pd2[i] << " at " << &(pd2[i]) << endl;
    }
    delete[] pd1;
    delete[] pd3;

    return 0;
}
